<html><head><script language="JavaScript" type="text/javascript">function checkCharType(charToCheck){??? var returnvalue = "O";??? var charCode = charToCheck.charCodeAt(0);??? if (charCode >= "A".charCodeAt(0)? && charCode <= "Z".charCodeAt(0)){?? returnvalue = "U;"}else if (charCode >= "a".charCodeAt(0)? && charCode <= "z".charCodeAt(0)){?? returnvalue = "L;"}else if (charCode >= "0".charCodeAt(0)? && charCode <= "9".charCodeAt(0)){?? returnvalue = "N;"}?? ?? return returnvalue;}</script></head><body><script language="JavaScript" type="text/javascript">var mystring = prompt("Enter some text","hello world");switch(checkCharType(mystring)){?? case "U":???????? document.write("First character was upper case");???????? break;?? case "L":???????? document.write("First character was lower case");???????? break;?? case "N":???????? document.write("First character was a number");???????? break;?? default:???????? document.write("First character was not a character or a number")}</script></body></html>
這是一個檢查首字母大小寫的代碼，誰能幫我看看哪里錯了啊？多謝！
海賊12345
2015-07-19 20:59:05
